Simple activities help explain what makes things wear away, how friction makes things hot, how it helps things to slip and slide or keeps them from doing it, how people use things which turn and spin to lessen friction, and how to make static electricity by friction Topics: Fricton, Friction
Explains the various facets of skyscraper construction, covering foundations, steel, vertical accuracy, derricks and cranes, concrete, curtain walls, elevators, air conditioning, and electricity and telephones Topics: Building, Skyscrapers, Building, Skyscrapers
byHalsey, William Frederick, 1882-1959; Bryan, J. (Joseph), 1904-
"Foreword It would require an extra chapter for me to list all the men who have helped me prepare this book. Certain of them, however, have been outstandingly prodigal of their efforts to make it complete and accurate. They have reminded me of important events I had forgotten and have sharpened my account of events dimly remembered; they have supplied names and dates, dispatches and other documents; they have saved me from countless sins of omission and commission; and if, here and there,... Topics: WWII, World War, 1939-1945, United States. Navy, World War, 1939-1945 -- Naval Operations,...
The man who heard Lincoln.-George Washington.-Thomas Jefferson.-Old Dr. Franklin.-John Paul Jones.-Patrick Henry.-Nathan Hale.-David Farragut.-Dorothea Dix.-Robert E. Lee.-Ulysses S. Grant.-George Washington Carver.-John Woodward Phillip
byEast, Edward M. (Edward Murray), 1879-1938; Bingham, Walter Van Dyke, 1880-1952
Biology and human problems, by E.M. East.--The prospects of the social sciences, by F.H. Hankins.--The renaissance of psychology, by Joseph Jastrow.--Educational psychology, by L.M. Terman.--Psychology in industry, by W.V. Bingham.--Heredity, by E.M. East.--The frontiers of medicine, by Morris Fishbein.--The outlook of public health work, by H.S. Cumming and A.M. Stimson.--Physiology of to-day, by E.K. Marshall, Jr.--Zoology and human welfare, by H.M. Parshley.--Efforts to increase the food... Topics: Biology, Psychology, Medicine, Public health